Apparatus for applying hard facing material to fish-tail bits



July 5, 1932- c. c. GOOLSBEE APPARATUS FOR APPLYING HARD FACING MATERIALTO FISH TAIL BITS Filed May 8. '1950 4 Sheets-Sheet l M h We CAM/Q6 6".65/6500 MZQMfi);

July 5, 1932. c. Q GOOLSBEE I 1,866,028

APPARATUS FOR APPLYING HARD FACING MATERIAL T0 FISH TAIL BITS Filed May8, 1959 4 Sheets-Sheet 2 amen H30;

Ola/lea C 600 Asbee,

Mwagdfiv July 5, 1932. c. c. GOOLSBEE 1,866,028

APPARATUS FOR APPLYING HARD FACING MATERIAL TO FISH TAIL BITS Filed May8, 1930 4 Sheets-Sheet 3 gwvmtor July 5, 1932.

c. c. GOOLSBEE APPARATUS FOR APPLYING HARD FACING MATERIAL TO FISH TAILBITS Filed May 8, 1930 4 Sheets-Sheet 4 M// M/ m a 1 l v e W w Q1; 5 ole2m OW 1 M M mw m W Patented July 5, 1932 a UNrrsn rarsur OFFICE "one-EmsCULZBERSON GOOLSBEE, or nous'ron, TEXAS ArPARArUs non APPLYING mnnracmeMATERIAL To FISH-TAIL Brrs Application filed ma "s, 1930. Serial No.450,864.

This invention relates to a method of an extent of the cutting edges canbe controlled apparatus for applying hard facing material as well as thepenetration. to drill bits and the like. In he accompanying-drawings, Ihave il- In the oil fields where drilling is being lustrated two formsof apparatus suitable I constantly 'un'dertakemiit is a source of greatfor carrying out the foregoing process and expense and annoyance tomaintain the drill while these forms have been found very-isucbits inproper condition. At the present time cessful in operation it is to beunderstood that after a drill bit has been used fora relatively they areillustratedrmerely by way of examshort time it is found that the edgesbecome ple and are not to be taken as limiting the worn and dull andthat they have to be -faced present invent-ion. withahard wearing's'urfa'ce'befor'e continued In describing the apparatus employed, useof the same is foundffeasi-ble. reference will be had to'theaccompanying The methods, as known, so far, are eX- drawings inwhich corresponding parts are tremelycrude and necessitate expendituresilnilarly'nuinbere'd throughout the several 1 of a large amount of timewith consequent figures I a delay in again preparing the-drill bits for1 is awperspective view of my inven further use. Therefore, any'methodor metion. I 5 cha'ni'c'al device that will assist in applying 'Fig. -2is a front elevation with'a 'bit in the hard facing to the bits is o-f"considerable position. c

importance. In applying this hard facing Fig. 3 is a :side elevation;parts thereof bematerial to the bits consideration must be ing shown insection, witha bit clamped :in given to the speed of the operation aswell horizontal position I I as the saving of the alloy which is usedfor Fig. 4; is a fragmentary plan view of the refa'c'ing the bits andthe elimination ofas carbon block support and its adjusting mechmuchgrinding as possible after'the 'all oy anism the support therefor beingbroken 7' has been applied. By providing for all of away. e

these factors the expense of the drilling op- Fig. 5 is 'a fragmentaryside elevation of eration is materially reduced and it is posthe carbonblock support and its associated sible to use and reuse 'a single bit anumber mechanism partially 'i'nsection; p

of times. i Fig. 6 i-sfa plan view-of one *of the clamp- 23 In carryingou't'the present process the cuting jaws.

ting edges of the bits are supported in such Fig. 7 isan edge view ofthe same. a manner-that'they are inclined longitudinal- Fig. 8 is afragmentary view of one form ly and transversely and the support is ofof adjustmen't for the legs of the supporting such character "that thea'ngularity of the bit member. i p may be readily changed depending uponthe Fig. '9 -is an additional'form of leg adjustviscosity of the alloysemployed and the penement. L I tration desired. Figs. and I1 are sideand front elevations The process further consists in limitingrespectively of my invention illustrating still the flow of the alloyacross the'cutting edges "another form of adjustment for'the' frontlegt:-

of the bit so that it will be maintained to o'fthe support. w p gaugeand will eliminate the necessity of Fig. --12 is a'view showinggenerally the grinding or otherwise removing burrs from relation betweenthe bit and carbon block the sides of the cutting faceswhen in use.

It is believed to be obvious that by vary- Fig. 13 is avertical-sectional view'taken ing theinclination of the cutting edgesboth centrally through the "carbon 'block' 25 of longitudinallyandtransversely the proper Fig.10. flow of alloy across'the cuttingedges can More specifically, the apparatus for carrybe secured andthew-idth of the hard facing ing out the present process can be said tomaterial with reference to the longitudinal constitute a tripodcomprisingia body pro- 109 vided with downwardly diverging rear legs 2and 3 rigidly secured to said body, and an adjustable front leg 1pivoted to the body at 5 so that by moving the front leg with referenceto the rear legs a change in the angle of inclination of the body 1 maybe produced and consequently the bit, which is adapted to be supportedby the body 1, is inclined longitudinally.

The lower extremities of the legs 2, 3 and 4 are bent to form feet 6which furnish stable support and prevent the legs from penetrating thesurface on which the device'is supported.

Within the body 1 are located gripping jaws 7 and 8 both of which areinternally threaded as at 9 to mesh with the threads on the shank of thebit being welded.

The jaw 7. is held stationary on the bottom of the body 1 in anysuitable manner and the j aw 8 is vertically adjustable therein by'meansof the screw 10 swiveled to the jaw 8 and projected through the top ofthe body 1. The

screw lOis operated by means of the hand wheel 11 for raising andlowering the movable jaw 8 to accommodate the same to bits of varyingdiameters. r i I In Figs. 2 and 3 I have illustrated the device as it isactually used with. a fish-tail bit clamped between the jaws 7 and 8 andthe cutting edges of the bit projecting in the direction of the frontleg 4. 5-. It will be seen, therefore, thatthe-cutting edges of the bitto be welded are supported away from the body 1 so as to be clearlyvisible and readily accessible duringthe facing operation, therebyenabling adjustment of the various parts to suit the particularIcondition of the bit.

By locating the cutting edges of the bit in a readily accessibleposition, it is to be seen that the quality of the work is influencedsince the desire to complete the job under awkward conditionsliseliminated.

To the base of the body 1 a bar 12 is secured intermediate its ends toprovide out wardly projecting arms 13 and 14 extending transversely ofand in opposite directions from the body 1 and having their free. endsbent upwardly to form ears 15 and 16. Supporting rods 17 and 18 aresecured to the respective ears 1.5 and 16 and extend longitudinallyforwardly of the body 1.

The rods 17 and 18 are pivotally secured to'the ears 15 and 16 by meansof handles 19 and 20 having threaded ends 21 and 22 passing throughopenings inthe rearends of the rods 17 and 18 and threading intoopenings in the ears 15 and 16. V

Lock nuts 23 and. 24: cause the rods 17 and 18 to be jammed against theears 15 and 16 so that the rods are held in sition. a

By reference to any desired p0 Fig. 1, it will beseen that the rods 17and-18 aresupportedon opposite sides of the body 1 and that the angle ofinclination of the rods 17 and 18 can be varied to compensate forvariations in the angle of the front leg 4.

Supported on either one or the other of the and held in place'thereon byintegral upa standing flanges 27 connected to the'base of the supportwhich terminate in overhanging lips 27 as shown in Figs. 3 and 10. Thebase of the block support .26 is provided on its rear face-with abifurcated stud 28 which is adapted to pivotally receive a shaft 29adjustably secured in the block 30 by means of. the threaded handle 31threading into an aperture 32 in the block 30. until the end thereofengages the shaft 29, whereupon the block isheld securely in position.

The block is likewise adapted to be adjusted with respect to shaft29 andis held in its adjustedpositions byv means'of the bolt 33and lock nut 34so that the angle of inclination. of thejblock 26 can be varied withrespect to the shaft-29, and to engage the sides of the cutting edges ofthe bit in its various adjusted positions.

loosening the handle 31 the shaft 29 can be slid through theblock todetermine the degree of projection of the carbon block 25.

The carbon block 25 can likewise be moved along the rods 17 or 18 towardor away from the body 1 as desired. Y I

T his'is accomplishedby turning the handle 35 threaded into a secondopening 36 in the block 30 and having its end engaging either of therods 17 or 18 when in locked position, it being understood that the rod18 passes through an opening37 in the block 30.

From the description so far, it can be readily seen that after a bit hasbeen clamped between the jaws 7 and 8, the-front leg 1 may 1 theecasemay be, so that the carbon block will lie adjacent the side edges of thecutting blades of the bit. By loosening the handle 31 the shaft 29 canbe moved through the block 30 so asto cause the carbon block 25 toengage the side edges ofthe cutting blades and fur- .thermore theangularity of the carbon block itself can be adjusted so that as thealloy is flowed across the cutting edges it engages the carbon blockandmaintains the alloy true to From the foregoing. it will be seen thatby :5.

gauge so that no projecting burrs extend from the side edges of thecutting faces. i In addition to the foregoing adjustments, the rods '17and 18 are independentlyadjustable by means of the handles 19 and 20sothat a device is provided that is extremely flexible in operation andpermits all adjustments to be accomplished quickly and easily. In orderto adjust the angularity of th front leg 4 I have illustratedseveralforms. The preferred form is illustrated in'Figs. 1 and 9 and consistsof a socket member 38 which is secured to a cross rod 39 extendingbetween the rear legs 2 and 3 by means of a yoke 40 which surrounds therod 39 and is se cured to the base of the socket member by means of nuts41.

Slidably secured in the socket member 38 is a screw 42 having an eye 43at the outer end thereof to receive the links of a chain 44 and theopposite end of the chain 44 is secured to the front leg 4 by means ofthe spaced pins 45 and 46 between which the links of the chain areadapted to wedge.

The screw 42 is held in adjusted position in the socket member 38 bymeans of the handle 47 which is threaded into the socket memher andengages the screw 42.

Therefore, by loosening the handle 47 and moving the screw 42 in or outof the socket the leg 4 is adjusted, and when the proper adjustment hasbeenmade tightening of the handle 47 will maintain the leg 4 andconsequently the body 1 in the desired'angular position.

In Fig. 8 I have illustrated a simple form of adjustment for the frontleg 4 which consists in securing one end of a chain to the cross rod 39and passing the other end of the chain pet-ween spaced lugs 45 and 46 onthe front eg 4. Referring now to Figs. 10 and 11 I have illustrated afurther modification of my invention with particular reference to theadj ustment of the front leg 4.

In these views it is tobe understoodthat the construction of the body 1and the rear legs together with its associated mechanism is the same aspreviously described. but in this form the carbon block is adapted to besupported on one side of the machine only b means of a single transverserod 12, the support for and the adjustment of the carbon block beingunchanged.

In this form of the invention the front leg 4 has an angular extension48 pivoted at 49 to a link 50 which is pivotally secured on the crossrod 39 extending between the rear legs. The leg 4 is likewise providedwith spaced upstanding ears 51 integrally forinedtherewith and carries arack 52 on the downwardly inclined face of the front leg 4. v

Secured to the body 1 is a skirt 53 having bifurcated lips 54 topivotally receive the upper end of an extension 55 integral with thehandle 56,- the lower end of the extension 55 being pivotally securedbetween theupstandingears 51. r e Pivotally secured between the lips 54by means of the bolt 57 is a pawl 58, which falls by gravity into meshwith the rack 52 and thereby supports-the front leg 4 at the desired an1e. I

l n this case the adjustment of the front leg is accomplished merely byoperation of the handle 56, it being understood that opera tion in onedirection causes the pawl 58 to trail over the rack 52 and that weightof the bit clamped within the body member 1 will securely hold the pawlin engagement with the rack. In order to operate the handle in theopposite direction the pawl 58 must be I lifted from the rack and heldin such position until the desired adjustment has been made whereuponthe pawl 58 again falls into engagement with the rack 52.

Having now described in detail the apparatus involved it can be readilyunderstood from an examination of Figs. 2 and 3 that after the bit A hasbeen clamped in place the angularity of the front leg is adjusted tocause the bit A to assumea'longitudinally inclined position, afterwhich. the carbon block 25 is adjusted so that the face thereof engagesthe side edges of the cutting members and the bit A is rotated axiallyuntil the desired transverse inclination of theblades' have beenobtained. Having assumedsuch a position,

the alloy is flowed; across the cutting edges of the blade until itengages the carbon block.,

After the fish tail bit has been suitably adjusted in the vise and thecarbon block set in its predetermined position, it will be seen that thefish tail bit is centered therein so that the bit can be hard faced withreference to a true center.

i In ordinary practice, fish tail bits, arenot properly positioned whenbeing hard faced sothat the two cutting edges do not have the materialapplied equally thereto with re= lation to the true center of the bitand consequently one cuttingedge of the bitmay be built up with morehard facing material than the other. When such an unequally faced bit isused one cutting edge gives'away before 3 the other which "frequentlycontributes largely to the drilling of crooked holes with fish tailbits. The present invention prevents the unequal application of hardfacing material due to the factthatit is centered in the support andafter one cutting edge of the bit has been built up against the blockthe de sired amount, the bit can be revolved through 180 therebybringing the other cutting edge againstt'he carbon block and the secondcutting edge can then be built up anamount equal to that of the firstcutting edge. During this entire operation both cutting edges have beenbuilt up equally with hard facing penetrating the cutting edgessufliciently and whether or not the transverse inclination of thecutting edges is sufiicient to cause the metal'to flow thereacrossproperly. If not, it is simply necessary to release the jaw 8,

rotate the bit A to secure the desired inclination transversely and toadjust the front leg to vary the longitudinal. inclination of the bladeuntil the desired position has been obtained to insure proper'flow andpenetration of the alloy.

It is to be understood that some alloys are much more fluid than othersand consequently flow with greater ease; When such alloys are employed,very slight transverse angularity is needed but where extremely viscousalloys are employed greater angularity is found to be necessary, due tothe natural resistance to flow of such viscous alloys.

The process, therefore, consists in supporting a bit at suitable degreesof inclina tion both longitudinally and transversely, flowing a hardfacing alloy across the surface of the cutting edges of the bit and varying the inclination ofthe cutting edges both longitudinally andtransversely depending upon the viscosity of the alloy employed and thepenetration desired.

- Either arc welding or oxy-acetylene welding processes can be used withthe present apparatus and it has been found in actual -practicethat withthe present process and apparatus a 9 bit can be refaced in aboutfifteen minutes. This incluc es the, preparatory grinding, the puttingin and taking out of the bit from the vise and the finishing. In otherwords, with a welder and grinder on the job and with facilities forswinging the bit into place, one bit of the above mentioned size can becompletely renovated and turned its out ready for use every fifteenminutes. The aletual welding time is, of course, less than t at.

The carbon block which is one of the salient features of the presentinvention has been found to be very durable and to keep in good shapefor about seventy-five hard facing jobs and their renewal is anegligible expense.

In view of the fact that present day methods are quite laborious andnecessitate considerably longer intervals of time it can be seen thatthe present invention is a decided advance in theart and that theapparatus employed is a very durable construction which can bemanufactured inexpensively.

I claim:

1. In an apparatus for applying hard facing alloys to drill bits and thelike, the combination of a support for said bit, means for securing saidbit on the support and a car bon block carried by said support andengaging the sides of the cutting edges of said bit. 1 7 v 2. In anapparatus of the character described, the combination of a support,clamping'jaws on'said support for supporting a drill bit, a carbon blocksecured on said support and positioned to engage the sides of thecutting edges of said bit, and means for adjusting said carbon block toaccommodate bits of varying size. 1

3. In an apparatus of the character described, the combination of' asupport including legs, clamping jaws on said support for supporting adrill bit, a carbon block secured to said support and engaging the sidesof the cutting edges of the bit and means for adjusting one of the legsof said support to maintain the drill bit at varying angles oflongitudinal inclination.

4. In an apparatus of the character described, the combination of asupport for a drill bit, means for securing said bit in said supportwith its cutting edge inclined both longitudinally and transversely, anda carbon block engaging the side of the cutting edge at any andall'degrees of inclination thereof. V

5. In an apparatus of the character de scribed, a support for drillbits, and a carbonblock engaging the side of the cutting edge thereof,said block being mounted on said support so as to be adjustablelongitudinally, transversely and vertically.

6. In an apparatus of the character described, a support for drill bits,means for adjustably'securing the bit in said support with a cuttingedge in transversely inclined position, a carbon block engaging the sideof said cutting edge, and means for varying the inclination of saidcarbon block so that it lies in a plane at right angles to the plane ofthe cutting edge of the bit.

7. In an apparatus of the character described, a support for drill bits,means for adjustably securing bits in said support so as to permit acutting edge thereof to be variably inclined both longitudinally andtransversely, a carbon block engaging the side of said cutting edge, andmeans for varying the angle of the carbon block in accordance with thevariation in transverse inclination of the cutting edge of the bit.

8. In an apparatus of the character de scribed, a vise for supportingdrill bits, legs for said vise, one of which is adjustable to providelongitudinal inclination of the drill bit, said vise permitting rotationof the bit therein to provide transverse inclination to the cutting edgeof the bit, and a carbon block adjustably carried by said support so asto engage the side of the cutting edge regardless of the inclination ofthe cutting edges.

9. In an apparatus of the character described, a vise for supportingdrill bits, rear legs and an adjustable front leg for said vise, meansfor adjusting the front leg to produce a longitudinal inclination of thedrill bit said vise permitting transverse inclination the cutting edgesof the hit, an arm pivoted to the vise for vertical adjustment, a blockslidable on said arm, a shaft slidably extending transverselythroughsaid block, a carbon block pivotally supported on said shaft, and

w means for locking the first mentioned block to said arm and shaft.

10. In an apparatus of the character described, the combination of asupport, clamping jaws on said support for supportin an article, armssecured to said support on 0th sides of said clamping jaws, and a carbonblock secured on one of said arms and engaging one side of the articlebeing supported.

2O 11. In an apparatus of the character described, the combination of asupport for a drill bit, means for securing said bit in said supportwith its cutting edge inclined, a carbon block on said support engagingthe side of the cutting edge at any and all degrees of inclinationthereof, and means for adjusting the carbon block to accommodate bits ofVarying size.

In testimony whereof I hereunto affix my signature.

CHARLES CULBERSON GOOLSBEE.

